EFFICACY OF CONTROL MEASURES IN MASTITIS AT MACHINE-MILKED DAIRY FARMS

Combined treatment with teat dipping (chlorhexidine, 0.5%) and complet e dry therapy (ampicillin cloxacillin combination) reduced the overall incidence of subclinical mastitis by 31.43% (animal-wise) and 28.36% (quarter-wise), and that of clinical mastitis by 42.86% on 7 machine-m ilked dairy farms. The combination of post-milking teat dipping with p ovidone iodine (0.5%, available iodine) and complete dry therapy (ampi cillin-cloxacillin combination) resulted in overall reduction in incid ence of subclinical mastitis by 38.80% (animal-wise) and 41.77% (quart er-wise), and that of clinical mastitis by 60%. In control herd, the i ncidence of subclinical mastitis increased from 45.45% to 50.00% (quar ter-wise) and from 20.45% to 25.00% (quarter-wise) at the end of 11 mo nths trial. Two cases of clinical mastitis, one each in the first and the second half of trial, were observed.